It does. But using energy and being nourished aren't the same things.
[Steeples fingers and rests his chin on them, thinking. How to explain this to someone who likely has no concept of cells?]
Think of it like a river. The presence of water nourishes and enhances those living around it. They can have as much water as they wish, but getting the water requires energy on its own; yet using the energy to get the water doesn't reduce the amount of water available. It only changes how much water they can bear.
For most sorcerers, the amount of energy it takes to use their magic is negligible. It can tire us to use it, yes, but not so much that it ceases to be a nourishment. A sorcerer only cuts themselves off from their magic, temporarily, if they exhaust themselves to such a point that their bodies can no longer accept magic until they've rested; and only an idiot or a desperate man would go so far. It isn't terribly fun.
[Video]
[Steeples fingers and rests his chin on them, thinking. How to explain this to someone who likely has no concept of cells?]
Think of it like a river. The presence of water nourishes and enhances those living around it. They can have as much water as they wish, but getting the water requires energy on its own; yet using the energy to get the water doesn't reduce the amount of water available. It only changes how much water they can bear.
For most sorcerers, the amount of energy it takes to use their magic is negligible. It can tire us to use it, yes, but not so much that it ceases to be a nourishment. A sorcerer only cuts themselves off from their magic, temporarily, if they exhaust themselves to such a point that their bodies can no longer accept magic until they've rested; and only an idiot or a desperate man would go so far. It isn't terribly fun.